package com.exampleyyy.demoyyy.service;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.toolkit.IdWorker;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.exampleyyy.demoyyy.JieKouSHITIYYY.OrderMapper;
import com.exampleyyy.demoyyy.JieKouService.OrderServiceJieKou;
import com.exampleyyy.demoyyy.SHITIYYY.*;
import com.exampleyyy.demoyyy.common.BaseContext;
import com.exampleyyy.demoyyy.common.CustomException;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.stream.Collectors;


@Service
@Slf4j
public class OrderService extends ServiceImpl<OrderMapper, Orders> implements OrderServiceJieKou {
    @Autowired
    private ShoppingCartService shoppingCartService;

    @Autowired
    private UserService userService;

    @Autowired
    private AddressBookService addressBookService;

    @Autowired
    private OrderDetailService orderDetailService;

    @Transactional
    public Integer submit(Orders orders){
        try {  //  保证代码健壮性
            //获得当前用户id
            Long userId = BaseContext.getCurrentId();
            //查询当前用户的购物车数据
            LambdaQueryWrapper<ShoppingCart> wrapper = new LambdaQueryWrapper<>();
            wrapper.eq(ShoppingCart::getUserId, userId);
            List<ShoppingCart> shoppingCarts = shoppingCartService.list(wrapper);

            if (shoppingCarts == null || shoppingCarts.size() == 0) {
                throw new CustomException("购物车为空，不能下单");
            }

            //查询用户数据
            User user = userService.getById(userId);

            //查询地址数据
            Long addressBookId = orders.getAddressBookId();
            AddressBook addressBook = addressBookService.getById(addressBookId);
            if (addressBook == null) {
                throw new CustomException("用户地址信息有误，不能下单");
            }

            long orderId = IdWorker.getId();//订单号

            AtomicInteger amount = new AtomicInteger(0);

            //组装订单明细信息
            List<OrderDetail> orderDetails = shoppingCarts.stream().map((item) -> {
                OrderDetail orderDetail = new OrderDetail();
                orderDetail.setOrderId(orderId);
                orderDetail.setNumber(item.getNumber());
                orderDetail.setDishFlavor(item.getDishFlavor());
                orderDetail.setDishId(item.getDishId());
                orderDetail.setSetmealId(item.getSetmealId());
                orderDetail.setName(item.getName());
                orderDetail.setImage(item.getImage());
                orderDetail.setAmount(item.getAmount());
                amount.addAndGet(item.getAmount().multiply(new BigDecimal(item.getNumber())).intValue());
                return orderDetail;
            }).collect(Collectors.toList());

            //组装订单数据
            orders.setId(orderId);
            orders.setOrderTime(LocalDateTime.now());
            orders.setCheckoutTime(LocalDateTime.now());
            orders.setStatus(2);
            orders.setAmount(new BigDecimal(amount.get()));//总金额
            orders.setUserId(userId);
            orders.setNumber(String.valueOf(orderId));
            orders.setUserName(user.getName());
            orders.setConsignee(addressBook.getConsignee());
            orders.setPhone(addressBook.getPhone());
            orders.setAddress((addressBook.getProvinceName() == null ? "" : addressBook.getProvinceName())
                    + (addressBook.getCityName() == null ? "" : addressBook.getCityName())
                    + (addressBook.getDistrictName() == null ? "" : addressBook.getDistrictName())
                    + (addressBook.getDetail() == null ? "" : addressBook.getDetail()));
            //向订单表插入数据，一条数据
            this.save(orders);

            //向订单明细表插入数据，多条数据
            orderDetailService.saveBatch(orderDetails);

            //清空购物车数据
            shoppingCartService.remove(wrapper);
            return 1;
        } catch ( Exception e ){
            System.out.println("这个错报是:"+e);
            return 0;
        }

    }
}